# EATON AZ-3-B40 3-Pole Miniature Circuit Breaker, 40A, B-Curve, 25kA

**URL:** https://aio.lv/en/product--eaton-174509--12464768
**Data updated:** 2026-05-18 09:42 (EEST)
**Category:** Power Sockets
**Manufacturer:** EATON
**Manufacturer code:** 174509
**EAN:** 4015081709656
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 127.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 105.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--eaton-174509--12464768

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

The EATON AZ-3-B40 is a high-performance 3-pole miniature circuit breaker designed for reliable electrical circuit protection. Featuring a 40A rated current, B-type tripping characteristic, and a 25kA breaking capacity, this device is ideal for industrial and commercial power distribution systems. It ensures safety by effectively disconnecting circuits during overloads and short circuits, maintaining operational integrity in demanding electrical installations.

## Long description

The EATON AZ-3-B40 is a robust 3-pole miniature circuit breaker engineered to provide high-level protection for electrical distribution systems. With a rated current of 40A and a B-type tripping characteristic, this device is specifically designed to handle the demands of commercial and industrial environments. Its high breaking capacity of 25kA ensures that it can safely interrupt fault currents, protecting sensitive equipment and infrastructure from the risks associated with overloads and short circuits.
Advantages
This circuit breaker offers exceptional reliability and durability, making it a dependable choice for critical power distribution tasks. The 3-pole configuration allows for the simultaneous disconnection of three phases, ensuring comprehensive safety across the entire circuit. Its B-curve characteristic provides a balanced response to overcurrent, preventing nuisance tripping while maintaining rapid protection during genuine electrical faults. The high breaking capacity of 25kA distinguishes this unit as a premium solution for installations where high fault currents are a potential concern.
Suitable for
Industrial power distribution panels
Commercial building electrical systems
Protection of lighting and heating circuits
General electrical infrastructure requiring high-capacity fault protection
When it may not be suitable
This device is not intended for residential applications where lower breaking capacities are standard and more cost-effective solutions are available. It is also not suitable for circuits requiring C or D curve tripping characteristics, which are designed for high-inrush current loads like large motors or transformers.
Key specifications
Number of poles: 3
Rated current: 40A
Tripping characteristic: B-curve
Breaking capacity: 25kA
Mounting type: DIN rail
How to use
The EATON AZ-3-B40 should be installed by a qualified electrician in accordance with local electrical regulations. It is designed for mounting onto a standard DIN rail within a distribution board or enclosure. Ensure that the supply cables are securely connected to the terminals, observing the correct torque settings to prevent overheating. Once installed, the toggle switch can be used to manually open or close the circuit, while the internal mechanism will automatically trip the breaker in the event of an electrical fault.
What to consider before purchase
Verify that the 40A rating matches your circuit requirements
Ensure the B-curve characteristic is appropriate for your specific load type
Confirm that the 25kA breaking capacity is sufficient for the prospective short-circuit current at the installation point
Check available space in your distribution board for a 3-pole device
Usage recommendations
Regular inspection of the circuit breaker and its connections is recommended to ensure long-term operational safety. Do not attempt to bypass or modify the device, as this will compromise its protective functions and void safety certifications.

## FAQ

### How much does the EATON AZ-3-B40 3-Pole Miniature Circuit Breaker 40A cost, and is it available for purchase?

The price is 127.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can EATON AZ-3-B40 3-Pole Miniature Circuit Breaker 40A be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All EATON products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized EATON service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12464768/68766397_large.webp